Finding the Fourth Proportional to 2,225.50, 3,071.25 and 1,230.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.50 : 3,071.25 = 1,230.80 : x
2. Step 2: Convert to fraction form
   2,225.50/3,071.25 = 1,230.80/x
3. Step 3: Cross multiply
   2,225.50x = 3,071.25 × 1,230.80
4. Step 4: Simplify right side
   2,225.50x = 3,780,086.05
5. Step 5: Solve for x
   x = 3,780,086.05/2,225.50
6. Step 6: Final answer
   x = 1,698.53